package com.itheima.stock.service.impl;

import com.google.common.base.Strings;
import com.itheima.stock.mapper.SysUserMapper;
import com.itheima.stock.pojo.SysUser;
import com.itheima.stock.service.UserService;

import com.itheima.stock.utils.IdWorker;
import com.itheima.stock.vo.req.LoginReqVo;
import com.itheima.stock.vo.resp.LoginRespVo;
import com.itheima.stock.vo.resp.R;
import com.itheima.stock.vo.resp.ResponseCode;
import org.apache.commons.lang3.RandomStringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
public class UserServiceImpl implements UserService {
    // 用户登录
    @Autowired
    private SysUserMapper sysUserMapper;
    @Autowired
    private PasswordEncoder passwordEncoder;
    /**
     * 分布式环境保证生成id唯一
     */
    @Autowired
    private IdWorker idWorker;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 用户登录
     *
     * @param vo
     * @return
     */
    @Override
    public R<LoginRespVo> login(LoginReqVo vo) {
        //判断对象,判断用户名,判断密码是否为空
        if (vo == null || Strings.isNullOrEmpty(vo.getUsername())
                || Strings.isNullOrEmpty(vo.getPassword())
                || Strings.isNullOrEmpty(vo.getCode())
                || Strings.isNullOrEmpty(vo.getRkey())) {
            return R.error(ResponseCode.DATA_ERROR.getMessage());
        }
        //=======================验证码校验过程========================
        //从redis中获取生成的验证码
        String rCode = (String) redisTemplate.opsForValue().get(vo.getRkey());
        //校验验证码
        //rCode如果为空代表验证码超时了
        //vo.getCode 跟请求带的验证码比较
        //!rCode.equals(vo.getCode())) 取反  验证码不匹配时进来
        if (Strings.isNullOrEmpty(rCode) || !rCode.equals(vo.getCode())) {
            return R.error(ResponseCode.DATA_ERROR.getMessage());
        }
        //redis清除key
        redisTemplate.delete(vo.getRkey());

        //根据用户名查询用户信息
        SysUser user = sysUserMapper.findByUserName(vo.getUsername());
        //判断用户是否存在，存在则密码校验比对
        //SYSTEM_PASSWORD_ERROR  账号或密码错误
        if (user == null || !passwordEncoder.matches(vo.getPassword(), user.getPassword())) {
            return R.error(ResponseCode.SYSTEM_PASSWORD_ERROR.getMessage());
        }
        //组装登录成功数据
        LoginRespVo respVo = new LoginRespVo();
        //属性名称与类型必须相同，否则copy不到
        BeanUtils.copyProperties(user, respVo);
        return R.ok(respVo);
    }

    /**
     * 生成验证码
     * map结构：
     * code： xxx,
     * rkey: xxx
     *
     * @return
     */
    @Override
    public R<Map> generateCaptcha() {
        //1.生成4位数字验证码
        String checkCode = RandomStringUtils.randomNumeric(4);
        //2.获取全局唯一id
        String rkey = String.valueOf(idWorker.nextId());
        //验证码存入redis中，并设置有效期1分钟
        redisTemplate.opsForValue().set(rkey, checkCode, 60, TimeUnit.SECONDS);
        //3.组装数据
        HashMap<String, String> map = new HashMap<>();
        map.put("rkey", rkey);
        map.put("code", checkCode);
        return R.ok(map);
    }
}








